NEW for 2025!

Exciting times at Gemmology Today as we welcomed 2025 with a brand new format! Introducing GT Podicles, a blend of podcasts and audio articles (that in some cases can be downloaded as a PDF) that will be published every month. Whether you are commuting to work, at the gym or just chilling out, with GT Podicles, you can stay informed. Check them out!

September Podicles

Transforming a piece of rough gem into a finished gemstone involves several key stages: pre-forming, faceting, and polishing. Before cutting begins, a lapidary must make critical decisions that ultimately will influence both the final value of the gemstone and its profitability.

In GT Podicle #22, David and Jane explore the art and science of coloured gemstone cutting. They break down the stages of the process, the intricate decisions faced by lapidaries, and how the craft has evolved—from traditional hand techniques to modern automation—while also examining the global economic role of gemstone manufacturing hubs.

In GT Podicle #23, David and Jane explore diamond cutting—from classic styles like the round brilliant and Marcel Tolkowsky’s ideal proportions to modern techniques. They also cover the cutting process—cleaving, sawing, bruting, and polishing—and how factors like yield, shape, and recutting affect a diamond’s value.

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Listen to previous GT Podicles by clicking on the icon below!

Catawiki is an online auction platform for buying everything from vintage comic books to jewellery. Founded in 2008 by René Schoenmakers and Marco Jansen, the company has been hosting weekly online auctions since 2011. Catawiki now operates a network of over 240 experts who value, authenticate and curate objects. To visit their website, please click on their logo.

With Sole Leone Gem Academy, you can take a World Gem Foundation course, workshop, lecture or training in gemology or have your gemstones determined and your diamond tested! To visit their website, please click on their logo.

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Back Issues of Gemmology Today

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